Hello,
Dashboard > Updates > check again. The latest version of the core plugin you can download from this page – https://www.8theme.com/downloads/ https://www.8theme.com/demo/docs/royal/Plugins/Plugins_Update
About the slider on your home page, I do not see the problem – https://gyazo.com/ead02d0964d28cd8b9434dbabb9f2478 Please clear browser cache and check now more time.
Functionality of Slider revolution plugin is independent of the theme.
We are theme author and provide support for the theme only.
Please post different questions via different topics.
Regards